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      <h1 class="entry-title">9种排序算法的java实现</h1>
    
    
      <p class="meta">
        








  


<time datetime="2010-08-09T13:09:09+08:00" pubdate data-updated="true">Aug 9<span>th</span>, 2010</time>
        
      </p>
    
  </header>


<div class="entry-content"><p>使用枚举类型存入各算法和接口实现，main方法打印排序后的数组，也可以加入nanotime、currentTimeMillis测试效率，但可能数组太小不明显</p>

<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
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</pre></td><td class='code'><pre><code class='java'><span class='line'><span class="kn">package</span> <span class="n">comcolalife</span><span class="o">.</span><span class="na">demo</span><span class="o">.</span><span class="na">sort</span><span class="o">;</span>
</span><span class='line'><span class="kn">import</span> <span class="nn">java.util.Arrays</span><span class="o">;</span>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 冒择入希快(快改进)归(归改进)堆：9种排序算法的java实现</span>
</span><span class='line'><span class="cm"> * @author wangchaoqun</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">public</span> <span class="kd">class</span> <span class="nc">SortTest</span> <span class="o">{</span>
</span></code></pre></td></tr></table></div></figure>


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<span class='line-number'>418</span>
</pre></td><td class='code'><pre><code class='java'><span class='line'><span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="n">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="kt">int</span><span class="o">[]</span> <span class="n">original</span> <span class="o">=</span> <span class="o">{</span> <span class="mi">1</span><span class="o">,</span> <span class="mi">3</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="mi">10</span><span class="o">,</span> <span class="mi">4</span><span class="o">,</span> <span class="mi">8</span><span class="o">,</span> <span class="mi">5</span><span class="o">,</span> <span class="mi">21</span><span class="o">,</span> <span class="mi">43</span><span class="o">,</span> <span class="mi">29</span><span class="o">,</span> <span class="mi">53</span> <span class="o">};</span>
</span><span class='line'>  <span class="c1">// 执行排序算法</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="n">Sorts</span> <span class="n">each</span> <span class="o">:</span> <span class="n">Sorts</span><span class="o">.</span><span class="na">values</span><span class="o">())</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">print</span><span class="o">(</span><span class="n">each</span><span class="o">.</span><span class="na">name</span><span class="o">()</span> <span class="o">+</span> <span class="s">&quot;   &quot;</span><span class="o">);</span>
</span><span class='line'>      <span class="kt">int</span><span class="o">[]</span> <span class="n">data</span> <span class="o">=</span> <span class="n">Arrays</span><span class="o">.</span><span class="na">copyOf</span><span class="o">(</span><span class="n">original</span><span class="o">,</span> <span class="n">original</span><span class="o">.</span><span class="na">length</span><span class="o">);</span>
</span><span class='line'>      <span class="n">each</span><span class="o">.</span><span class="na">impl</span><span class="o">().</span><span class="na">sort</span><span class="o">(</span><span class="n">data</span><span class="o">);</span>
</span><span class='line'>      <span class="n">print</span><span class="o">(</span><span class="n">data</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="c1">// java.util.Arrays类使用调优的快速排序法</span>
</span><span class='line'>  <span class="n">Arrays</span><span class="o">.</span><span class="na">sort</span><span class="o">(</span><span class="n">original</span><span class="o">);</span>
</span><span class='line'>  <span class="n">print</span><span class="o">(</span><span class="n">original</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">print</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">each</span> <span class="o">:</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">print</span><span class="o">(</span><span class="n">each</span> <span class="o">+</span> <span class="s">&quot; &quot;</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="n">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">();</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 插入排序算法</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">InsertSort</span> <span class="kd">implements</span> <span class="n">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">1</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">j</span> <span class="o">=</span> <span class="n">i</span><span class="o">;</span> <span class="o">(</span><span class="n">j</span> <span class="o">&gt;</span> <span class="mi">0</span><span class="o">)</span> <span class="o">&amp;&amp;</span> <span class="o">(</span><span class="n">data</span><span class="o">[</span><span class="n">j</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">[</span><span class="n">j</span> <span class="o">-</span> <span class="mi">1</span><span class="o">]);</span> <span class="n">j</span><span class="o">--)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">j</span><span class="o">,</span> <span class="n">j</span> <span class="o">-</span> <span class="mi">1</span><span class="o">);</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 冒泡排序算法</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">BubbleSort</span> <span class="kd">implements</span> <span class="n">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">j</span> <span class="o">=</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span> <span class="o">-</span> <span class="mi">1</span><span class="o">;</span> <span class="n">j</span> <span class="o">&gt;</span> <span class="n">i</span><span class="o">;</span> <span class="n">j</span><span class="o">--)</span> <span class="o">{</span>
</span><span class='line'>          <span class="k">if</span> <span class="o">(</span><span class="n">data</span><span class="o">[</span><span class="n">j</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">[</span><span class="n">j</span> <span class="o">-</span> <span class="mi">1</span><span class="o">])</span> <span class="o">{</span>
</span><span class='line'>              <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">j</span><span class="o">,</span> <span class="n">j</span> <span class="o">-</span> <span class="mi">1</span><span class="o">);</span>
</span><span class='line'>          <span class="o">}</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 选择排序算法</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">SelectionSort</span> <span class="kd">implements</span> <span class="n">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="kt">int</span> <span class="n">lowIndex</span> <span class="o">=</span> <span class="n">i</span><span class="o">;</span>
</span><span class='line'>      <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">j</span> <span class="o">=</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span> <span class="o">-</span> <span class="mi">1</span><span class="o">;</span> <span class="n">j</span> <span class="o">&gt;</span> <span class="n">i</span><span class="o">;</span> <span class="n">j</span><span class="o">--)</span> <span class="o">{</span>
</span><span class='line'>          <span class="k">if</span> <span class="o">(</span><span class="n">data</span><span class="o">[</span><span class="n">j</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">[</span><span class="n">lowIndex</span><span class="o">])</span> <span class="o">{</span>
</span><span class='line'>              <span class="n">lowIndex</span> <span class="o">=</span> <span class="n">j</span><span class="o">;</span>
</span><span class='line'>          <span class="o">}</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>      <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">i</span><span class="o">,</span> <span class="n">lowIndex</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 希尔排序算法</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">ShellSort</span> <span class="kd">implements</span> <span class="n">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span> <span class="o">/</span> <span class="mi">2</span><span class="o">;</span> <span class="n">i</span> <span class="o">&gt;</span> <span class="mi">2</span><span class="o">;</span> <span class="n">i</span> <span class="o">/=</span> <span class="mi">2</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">j</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">j</span> <span class="o">&lt;</span> <span class="n">i</span><span class="o">;</span> <span class="n">j</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">insertSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">j</span><span class="o">,</span> <span class="n">i</span><span class="o">);</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="n">insertSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="mi">0</span><span class="o">,</span> <span class="mi">1</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">private</span> <span class="kt">void</span> <span class="nf">insertSort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">,</span> <span class="kt">int</span> <span class="n">start</span><span class="o">,</span> <span class="kt">int</span> <span class="n">inc</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="n">start</span> <span class="o">+</span> <span class="n">inc</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">;</span> <span class="n">i</span> <span class="o">+=</span> <span class="n">inc</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">j</span> <span class="o">=</span> <span class="n">i</span><span class="o">;</span> <span class="o">(</span><span class="n">j</span> <span class="o">&gt;=</span> <span class="n">inc</span><span class="o">)</span> <span class="o">&amp;&amp;</span> <span class="o">(</span><span class="n">data</span><span class="o">[</span><span class="n">j</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">[</span><span class="n">j</span> <span class="o">-</span> <span class="n">inc</span><span class="o">]);</span> <span class="n">j</span> <span class="o">-=</span> <span class="n">inc</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">j</span><span class="o">,</span> <span class="n">j</span> <span class="o">-</span> <span class="n">inc</span><span class="o">);</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 快速排序算法</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">QuickSort</span> <span class="kd">implements</span> <span class="n">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="n">quickSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="mi">0</span><span class="o">,</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span> <span class="o">-</span> <span class="mi">1</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">private</span> <span class="kt">void</span> <span class="nf">quickSort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">,</span> <span class="kt">int</span> <span class="n">first</span><span class="o">,</span> <span class="kt">int</span> <span class="n">last</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">if</span> <span class="o">(</span><span class="n">first</span> <span class="o">&gt;=</span> <span class="n">last</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span><span class="o">;</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>
</span><span class='line'>  <span class="kt">int</span> <span class="n">pivot</span> <span class="o">=</span> <span class="n">partition</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">first</span><span class="o">,</span> <span class="n">last</span><span class="o">,</span> <span class="n">first</span><span class="o">);</span>
</span><span class='line'>  <span class="n">quickSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">first</span><span class="o">,</span> <span class="n">pivot</span> <span class="o">-</span> <span class="mi">1</span><span class="o">);</span><span class="c1">// 对左半段排序</span>
</span><span class='line'>  <span class="n">quickSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">pivot</span> <span class="o">+</span> <span class="mi">1</span><span class="o">,</span> <span class="n">last</span><span class="o">);</span><span class="c1">// 对右半段排序</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">private</span> <span class="kt">int</span> <span class="nf">partition</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">,</span> <span class="kt">int</span> <span class="n">first</span><span class="o">,</span> <span class="kt">int</span> <span class="n">last</span><span class="o">,</span> <span class="kt">int</span> <span class="n">pivot</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">while</span> <span class="o">(</span><span class="kc">true</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">while</span> <span class="o">(</span><span class="n">data</span><span class="o">[++</span><span class="n">first</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">[</span><span class="n">pivot</span><span class="o">])</span>
</span><span class='line'>          <span class="o">;</span>
</span><span class='line'>      <span class="k">while</span> <span class="o">(</span><span class="n">data</span><span class="o">[--</span><span class="n">last</span><span class="o">]</span> <span class="o">&gt;</span> <span class="n">data</span><span class="o">[</span><span class="n">pivot</span><span class="o">])</span>
</span><span class='line'>          <span class="o">;</span>
</span><span class='line'>      <span class="k">if</span> <span class="o">(</span><span class="n">first</span> <span class="o">&gt;=</span> <span class="n">last</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>          <span class="k">break</span><span class="o">;</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>      <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">first</span><span class="o">,</span> <span class="n">last</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">last</span><span class="o">,</span> <span class="n">pivot</span><span class="o">);</span>
</span><span class='line'>  <span class="k">return</span> <span class="n">last</span><span class="o">;</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 改进的快速排序算法</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">ImprovedQuickSort</span> <span class="kd">implements</span> <span class="n">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">private</span> <span class="kd">static</span> <span class="kt">int</span> <span class="n">MAX_STACK_SIZE</span> <span class="o">=</span> <span class="mi">4096</span><span class="o">;</span>
</span><span class='line'><span class="kd">private</span> <span class="kd">static</span> <span class="kt">int</span> <span class="n">THRESHOLD</span> <span class="o">=</span> <span class="mi">10</span><span class="o">;</span>
</span><span class='line'>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="kt">int</span><span class="o">[]</span> <span class="n">stack</span> <span class="o">=</span> <span class="k">new</span> <span class="kt">int</span><span class="o">[</span><span class="n">MAX_STACK_SIZE</span><span class="o">];</span>
</span><span class='line'>
</span><span class='line'>  <span class="kt">int</span> <span class="n">top</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span><span class="o">;</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">pivot</span><span class="o">;</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">pivotIndex</span><span class="o">,</span> <span class="n">l</span><span class="o">,</span> <span class="n">r</span><span class="o">;</span>
</span><span class='line'>
</span><span class='line'>  <span class="n">stack</span><span class="o">[++</span><span class="n">top</span><span class="o">]</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span>
</span><span class='line'>  <span class="n">stack</span><span class="o">[++</span><span class="n">top</span><span class="o">]</span> <span class="o">=</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span> <span class="o">-</span> <span class="mi">1</span><span class="o">;</span>
</span><span class='line'>
</span><span class='line'>  <span class="k">while</span> <span class="o">(</span><span class="n">top</span> <span class="o">&gt;</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="kt">int</span> <span class="n">j</span> <span class="o">=</span> <span class="n">stack</span><span class="o">[</span><span class="n">top</span><span class="o">--];</span>
</span><span class='line'>      <span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="n">stack</span><span class="o">[</span><span class="n">top</span><span class="o">--];</span>
</span><span class='line'>
</span><span class='line'>      <span class="n">pivotIndex</span> <span class="o">=</span> <span class="o">(</span><span class="n">i</span> <span class="o">+</span> <span class="n">j</span><span class="o">)</span> <span class="o">/</span> <span class="mi">2</span><span class="o">;</span>
</span><span class='line'>      <span class="n">pivot</span> <span class="o">=</span> <span class="n">data</span><span class="o">[</span><span class="n">pivotIndex</span><span class="o">];</span>
</span><span class='line'>
</span><span class='line'>      <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">pivotIndex</span><span class="o">,</span> <span class="n">j</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'>      <span class="c1">// partition</span>
</span><span class='line'>      <span class="n">l</span> <span class="o">=</span> <span class="n">i</span> <span class="o">-</span> <span class="mi">1</span><span class="o">;</span>
</span><span class='line'>      <span class="n">r</span> <span class="o">=</span> <span class="n">j</span><span class="o">;</span>
</span><span class='line'>      <span class="k">do</span> <span class="o">{</span>
</span><span class='line'>          <span class="k">while</span> <span class="o">(</span><span class="n">data</span><span class="o">[++</span><span class="n">l</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">pivot</span><span class="o">)</span>
</span><span class='line'>              <span class="o">;</span>
</span><span class='line'>          <span class="k">while</span> <span class="o">((</span><span class="n">r</span> <span class="o">!=</span> <span class="mi">0</span><span class="o">)</span> <span class="o">&amp;&amp;</span> <span class="o">(</span><span class="n">data</span><span class="o">[--</span><span class="n">r</span><span class="o">]</span> <span class="o">&gt;</span> <span class="n">pivot</span><span class="o">))</span>
</span><span class='line'>              <span class="o">;</span>
</span><span class='line'>          <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">l</span><span class="o">,</span> <span class="n">r</span><span class="o">);</span>
</span><span class='line'>      <span class="o">}</span> <span class="k">while</span> <span class="o">(</span><span class="n">l</span> <span class="o">&lt;</span> <span class="n">r</span><span class="o">);</span>
</span><span class='line'>      <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">l</span><span class="o">,</span> <span class="n">r</span><span class="o">);</span>
</span><span class='line'>      <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">l</span><span class="o">,</span> <span class="n">j</span><span class="o">);</span>
</span><span class='line'>
</span><span class='line'>      <span class="k">if</span> <span class="o">((</span><span class="n">l</span> <span class="o">-</span> <span class="n">i</span><span class="o">)</span> <span class="o">&gt;</span> <span class="n">THRESHOLD</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">stack</span><span class="o">[++</span><span class="n">top</span><span class="o">]</span> <span class="o">=</span> <span class="n">i</span><span class="o">;</span>
</span><span class='line'>          <span class="n">stack</span><span class="o">[++</span><span class="n">top</span><span class="o">]</span> <span class="o">=</span> <span class="n">l</span> <span class="o">-</span> <span class="mi">1</span><span class="o">;</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>      <span class="k">if</span> <span class="o">((</span><span class="n">j</span> <span class="o">-</span> <span class="n">l</span><span class="o">)</span> <span class="o">&gt;</span> <span class="n">THRESHOLD</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">stack</span><span class="o">[++</span><span class="n">top</span><span class="o">]</span> <span class="o">=</span> <span class="n">l</span> <span class="o">+</span> <span class="mi">1</span><span class="o">;</span>
</span><span class='line'>          <span class="n">stack</span><span class="o">[++</span><span class="n">top</span><span class="o">]</span> <span class="o">=</span> <span class="n">j</span><span class="o">;</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="n">insertSort</span><span class="o">(</span><span class="n">data</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">private</span> <span class="kt">void</span> <span class="nf">insertSort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">1</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">j</span> <span class="o">=</span> <span class="n">i</span><span class="o">;</span> <span class="o">(</span><span class="n">j</span> <span class="o">&gt;</span> <span class="mi">0</span><span class="o">)</span> <span class="o">&amp;&amp;</span> <span class="o">(</span><span class="n">data</span><span class="o">[</span><span class="n">j</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">[</span><span class="n">j</span> <span class="o">-</span> <span class="mi">1</span><span class="o">]);</span> <span class="n">j</span><span class="o">--)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">j</span><span class="o">,</span> <span class="n">j</span> <span class="o">-</span> <span class="mi">1</span><span class="o">);</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 归并排序算法</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">MergeSort</span> <span class="kd">implements</span> <span class="n">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="kt">int</span><span class="o">[]</span> <span class="n">temp</span> <span class="o">=</span> <span class="k">new</span> <span class="kt">int</span><span class="o">[</span><span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">];</span>
</span><span class='line'>  <span class="n">mergeSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">temp</span><span class="o">,</span> <span class="mi">0</span><span class="o">,</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span> <span class="o">-</span> <span class="mi">1</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">private</span> <span class="kt">void</span> <span class="nf">mergeSort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">,</span> <span class="kt">int</span><span class="o">[]</span> <span class="n">temp</span><span class="o">,</span> <span class="kt">int</span> <span class="n">left</span><span class="o">,</span> <span class="kt">int</span> <span class="n">right</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">if</span> <span class="o">(</span><span class="n">left</span> <span class="o">==</span> <span class="n">right</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span><span class="o">;</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">mid</span> <span class="o">=</span> <span class="o">(</span><span class="n">left</span> <span class="o">+</span> <span class="n">right</span><span class="o">)</span> <span class="o">/</span> <span class="mi">2</span><span class="o">;</span>
</span><span class='line'>  <span class="n">mergeSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">temp</span><span class="o">,</span> <span class="n">left</span><span class="o">,</span> <span class="n">mid</span><span class="o">);</span>
</span><span class='line'>  <span class="n">mergeSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">temp</span><span class="o">,</span> <span class="n">mid</span> <span class="o">+</span> <span class="mi">1</span><span class="o">,</span> <span class="n">right</span><span class="o">);</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="n">left</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;=</span> <span class="n">right</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">temp</span> <span class="o">=</span> <span class="n">Arrays</span><span class="o">.</span><span class="na">copyOf</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">i1</span> <span class="o">=</span> <span class="n">left</span><span class="o">;</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">i2</span> <span class="o">=</span> <span class="n">mid</span> <span class="o">+</span> <span class="mi">1</span><span class="o">;</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">cur</span> <span class="o">=</span> <span class="n">left</span><span class="o">;</span> <span class="n">cur</span> <span class="o">&lt;=</span> <span class="n">right</span><span class="o">;</span> <span class="n">cur</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">if</span> <span class="o">(</span><span class="n">i1</span> <span class="o">==</span> <span class="n">mid</span> <span class="o">+</span> <span class="mi">1</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">data</span><span class="o">[</span><span class="n">cur</span><span class="o">]</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">i2</span><span class="o">++];</span>
</span><span class='line'>      <span class="o">}</span> <span class="k">else</span> <span class="k">if</span> <span class="o">(</span><span class="n">i2</span> <span class="o">&gt;</span> <span class="n">right</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">data</span><span class="o">[</span><span class="n">cur</span><span class="o">]</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">i1</span><span class="o">++];</span>
</span><span class='line'>      <span class="o">}</span> <span class="k">else</span> <span class="k">if</span> <span class="o">(</span><span class="n">temp</span><span class="o">[</span><span class="n">i1</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">temp</span><span class="o">[</span><span class="n">i2</span><span class="o">])</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">data</span><span class="o">[</span><span class="n">cur</span><span class="o">]</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">i1</span><span class="o">++];</span>
</span><span class='line'>      <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">data</span><span class="o">[</span><span class="n">cur</span><span class="o">]</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">i2</span><span class="o">++];</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 改进的归并排序算法</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">ImprovedMergeSort</span> <span class="kd">implements</span> <span class="n">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="kt">int</span> <span class="n">THRESHOLD</span> <span class="o">=</span> <span class="mi">10</span><span class="o">;</span>
</span><span class='line'>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="kt">int</span><span class="o">[]</span> <span class="n">temp</span> <span class="o">=</span> <span class="k">new</span> <span class="kt">int</span><span class="o">[</span><span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">];</span>
</span><span class='line'>  <span class="n">mergeSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">temp</span><span class="o">,</span> <span class="mi">0</span><span class="o">,</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span> <span class="o">-</span> <span class="mi">1</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">private</span> <span class="kt">void</span> <span class="nf">mergeSort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">,</span> <span class="kt">int</span><span class="o">[]</span> <span class="n">temp</span><span class="o">,</span> <span class="kt">int</span> <span class="n">left</span><span class="o">,</span> <span class="kt">int</span> <span class="n">right</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">i</span><span class="o">,</span> <span class="n">j</span><span class="o">,</span> <span class="n">k</span><span class="o">;</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">mid</span> <span class="o">=</span> <span class="o">(</span><span class="n">left</span> <span class="o">+</span> <span class="n">right</span><span class="o">)</span> <span class="o">/</span> <span class="mi">2</span><span class="o">;</span>
</span><span class='line'>  <span class="k">if</span> <span class="o">(</span><span class="n">left</span> <span class="o">==</span> <span class="n">right</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span><span class="o">;</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="k">if</span> <span class="o">((</span><span class="n">mid</span> <span class="o">-</span> <span class="n">left</span><span class="o">)</span> <span class="o">&gt;=</span> <span class="n">THRESHOLD</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">mergeSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">temp</span><span class="o">,</span> <span class="n">left</span><span class="o">,</span> <span class="n">mid</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">insertSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">left</span><span class="o">,</span> <span class="n">mid</span> <span class="o">-</span> <span class="n">left</span> <span class="o">+</span> <span class="mi">1</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="k">if</span> <span class="o">((</span><span class="n">right</span> <span class="o">-</span> <span class="n">mid</span><span class="o">)</span> <span class="o">&gt;</span> <span class="n">THRESHOLD</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">mergeSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">temp</span><span class="o">,</span> <span class="n">mid</span> <span class="o">+</span> <span class="mi">1</span><span class="o">,</span> <span class="n">right</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">insertSort</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">mid</span> <span class="o">+</span> <span class="mi">1</span><span class="o">,</span> <span class="n">right</span> <span class="o">-</span> <span class="n">mid</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="n">i</span> <span class="o">=</span> <span class="n">left</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;=</span> <span class="n">mid</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">temp</span> <span class="o">=</span> <span class="n">Arrays</span><span class="o">.</span><span class="na">copyOf</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="n">j</span> <span class="o">=</span> <span class="mi">1</span><span class="o">;</span> <span class="n">j</span> <span class="o">&lt;=</span> <span class="n">right</span> <span class="o">-</span> <span class="n">mid</span><span class="o">;</span> <span class="n">j</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">temp</span><span class="o">[</span><span class="n">right</span> <span class="o">-</span> <span class="n">j</span> <span class="o">+</span> <span class="mi">1</span><span class="o">]</span> <span class="o">=</span> <span class="n">data</span><span class="o">[</span><span class="n">j</span> <span class="o">+</span> <span class="n">mid</span><span class="o">];</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">a</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">left</span><span class="o">];</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">b</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">right</span><span class="o">];</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="n">i</span> <span class="o">=</span> <span class="n">left</span><span class="o">,</span> <span class="n">j</span> <span class="o">=</span> <span class="n">right</span><span class="o">,</span> <span class="n">k</span> <span class="o">=</span> <span class="n">left</span><span class="o">;</span> <span class="n">k</span> <span class="o">&lt;=</span> <span class="n">right</span><span class="o">;</span> <span class="n">k</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">if</span> <span class="o">(</span><span class="n">a</span> <span class="o">&lt;</span> <span class="n">b</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">data</span><span class="o">[</span><span class="n">k</span><span class="o">]</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">i</span><span class="o">++];</span>
</span><span class='line'>          <span class="n">a</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">i</span><span class="o">];</span>
</span><span class='line'>      <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">data</span><span class="o">[</span><span class="n">k</span><span class="o">]</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">j</span><span class="o">--];</span>
</span><span class='line'>          <span class="n">b</span> <span class="o">=</span> <span class="n">temp</span><span class="o">[</span><span class="n">j</span><span class="o">];</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">private</span> <span class="kt">void</span> <span class="nf">insertSort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">,</span> <span class="kt">int</span> <span class="n">start</span><span class="o">,</span> <span class="kt">int</span> <span class="n">len</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="n">start</span> <span class="o">+</span> <span class="mi">1</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">start</span> <span class="o">+</span> <span class="n">len</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">j</span> <span class="o">=</span> <span class="n">i</span><span class="o">;</span> <span class="o">(</span><span class="n">j</span> <span class="o">&gt;</span> <span class="n">start</span><span class="o">)</span> <span class="o">&amp;&amp;</span> <span class="n">data</span><span class="o">[</span><span class="n">j</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">[</span><span class="n">j</span> <span class="o">-</span> <span class="mi">1</span><span class="o">];</span> <span class="n">j</span><span class="o">--)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">data</span><span class="o">,</span> <span class="n">j</span><span class="o">,</span> <span class="n">j</span> <span class="o">-</span> <span class="mi">1</span><span class="o">);</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 堆排序算法</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">HeapSort</span> <span class="kd">implements</span> <span class="n">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="n">MaxHeap</span> <span class="n">h</span> <span class="o">=</span> <span class="k">new</span> <span class="n">MaxHeap</span><span class="o">();</span>
</span><span class='line'>  <span class="n">h</span><span class="o">.</span><span class="na">init</span><span class="o">(</span><span class="n">data</span><span class="o">);</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">h</span><span class="o">.</span><span class="na">remove</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="n">System</span><span class="o">.</span><span class="na">arraycopy</span><span class="o">(</span><span class="n">h</span><span class="o">.</span><span class="na">queue</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="n">data</span><span class="o">,</span> <span class="mi">0</span><span class="o">,</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">private</span> <span class="kd">static</span> <span class="kd">class</span> <span class="nc">MaxHeap</span> <span class="o">{</span>
</span><span class='line'>  <span class="kt">void</span> <span class="nf">init</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">this</span><span class="o">.</span><span class="na">queue</span> <span class="o">=</span> <span class="k">new</span> <span class="kt">int</span><span class="o">[</span><span class="n">data</span><span class="o">.</span><span class="na">length</span> <span class="o">+</span> <span class="mi">1</span><span class="o">];</span>
</span><span class='line'>      <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">data</span><span class="o">.</span><span class="na">length</span><span class="o">;</span> <span class="n">i</span><span class="o">++)</span> <span class="o">{</span>
</span><span class='line'>          <span class="n">queue</span><span class="o">[++</span><span class="n">size</span><span class="o">]</span> <span class="o">=</span> <span class="n">data</span><span class="o">[</span><span class="n">i</span><span class="o">];</span>
</span><span class='line'>          <span class="n">fixUp</span><span class="o">(</span><span class="n">size</span><span class="o">);</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>
</span><span class='line'>  <span class="kd">private</span> <span class="kt">int</span> <span class="n">size</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span>
</span><span class='line'>  <span class="kd">private</span> <span class="kt">int</span><span class="o">[]</span> <span class="n">queue</span><span class="o">;</span>
</span><span class='line'>
</span><span class='line'>  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">remove</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">queue</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="n">size</span><span class="o">--);</span>
</span><span class='line'>      <span class="n">fixDown</span><span class="o">(</span><span class="mi">1</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>
</span><span class='line'>  <span class="c1">// fixdown</span>
</span><span class='line'>  <span class="kd">private</span> <span class="kt">void</span> <span class="nf">fixDown</span><span class="o">(</span><span class="kt">int</span> <span class="n">k</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="kt">int</span> <span class="n">j</span><span class="o">;</span>
</span><span class='line'>      <span class="k">while</span> <span class="o">((</span><span class="n">j</span> <span class="o">=</span> <span class="n">k</span> <span class="o">&lt;&lt;</span> <span class="mi">1</span><span class="o">)</span> <span class="o">&lt;=</span> <span class="n">size</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>          <span class="k">if</span> <span class="o">(</span><span class="n">j</span> <span class="o">&lt;</span> <span class="n">size</span> <span class="o">&amp;&amp;</span> <span class="n">queue</span><span class="o">[</span><span class="n">j</span><span class="o">]</span> <span class="o">&lt;</span> <span class="n">queue</span><span class="o">[</span><span class="n">j</span> <span class="o">+</span> <span class="mi">1</span><span class="o">])</span> <span class="o">{</span>
</span><span class='line'>              <span class="n">j</span><span class="o">++;</span>
</span><span class='line'>          <span class="o">}</span>
</span><span class='line'>          <span class="k">if</span> <span class="o">(</span><span class="n">queue</span><span class="o">[</span><span class="n">k</span><span class="o">]</span> <span class="o">&gt;</span> <span class="n">queue</span><span class="o">[</span><span class="n">j</span><span class="o">])</span> <span class="o">{</span> <span class="c1">// 不用交换</span>
</span><span class='line'>              <span class="k">break</span><span class="o">;</span>
</span><span class='line'>          <span class="o">}</span>
</span><span class='line'>          <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">queue</span><span class="o">,</span> <span class="n">j</span><span class="o">,</span> <span class="n">k</span><span class="o">);</span>
</span><span class='line'>          <span class="n">k</span> <span class="o">=</span> <span class="n">j</span><span class="o">;</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>
</span><span class='line'>  <span class="kd">private</span> <span class="kt">void</span> <span class="nf">fixUp</span><span class="o">(</span><span class="kt">int</span> <span class="n">k</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">while</span> <span class="o">(</span><span class="n">k</span> <span class="o">&gt;</span> <span class="mi">1</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>          <span class="kt">int</span> <span class="n">j</span> <span class="o">=</span> <span class="n">k</span> <span class="o">&gt;&gt;</span> <span class="mi">1</span><span class="o">;</span>
</span><span class='line'>          <span class="k">if</span> <span class="o">(</span><span class="n">queue</span><span class="o">[</span><span class="n">j</span><span class="o">]</span> <span class="o">&gt;</span> <span class="n">queue</span><span class="o">[</span><span class="n">k</span><span class="o">])</span> <span class="o">{</span>
</span><span class='line'>              <span class="k">break</span><span class="o">;</span>
</span><span class='line'>          <span class="o">}</span>
</span><span class='line'>          <span class="n">SortUtil</span><span class="o">.</span><span class="na">swap</span><span class="o">(</span><span class="n">queue</span><span class="o">,</span> <span class="n">j</span><span class="o">,</span> <span class="n">k</span><span class="o">);</span>
</span><span class='line'>          <span class="n">k</span> <span class="o">=</span> <span class="n">j</span><span class="o">;</span>
</span><span class='line'>      <span class="o">}</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 排序算法接口</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">interface</span> <span class="nc">Sort</span> <span class="o">{</span>
</span><span class='line'><span class="kd">public</span> <span class="kt">void</span> <span class="nf">sort</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">);</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 排序算法枚举</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">enum</span> <span class="n">Sorts</span> <span class="o">{</span>
</span><span class='line'><span class="n">INSERT</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>  <span class="kd">public</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span> <span class="k">new</span> <span class="nf">InsertSort</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">},</span>
</span><span class='line'><span class="n">BUBBLE</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>  <span class="kd">public</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span> <span class="k">new</span> <span class="nf">BubbleSort</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">},</span>
</span><span class='line'><span class="n">SELECTION</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>  <span class="kd">public</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span> <span class="k">new</span> <span class="nf">SelectionSort</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">},</span>
</span><span class='line'><span class="n">SHELL</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>  <span class="kd">public</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span> <span class="k">new</span> <span class="nf">ShellSort</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">},</span>
</span><span class='line'><span class="n">QUICK</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>  <span class="kd">public</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span> <span class="k">new</span> <span class="nf">QuickSort</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">},</span>
</span><span class='line'><span class="n">IMPROVED_QUICK</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>  <span class="kd">public</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span> <span class="k">new</span> <span class="nf">ImprovedQuickSort</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">},</span>
</span><span class='line'><span class="n">MERGE</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>  <span class="kd">public</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span> <span class="k">new</span> <span class="nf">MergeSort</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">},</span>
</span><span class='line'><span class="n">IMPROVED_MERGE</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>  <span class="kd">public</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span> <span class="k">new</span> <span class="nf">ImprovedMergeSort</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">},</span>
</span><span class='line'><span class="n">HEAP</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>  <span class="kd">public</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">()</span> <span class="o">{</span>
</span><span class='line'>      <span class="k">return</span> <span class="k">new</span> <span class="nf">HeapSort</span><span class="o">();</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'><span class="o">};</span>
</span><span class='line'>
</span><span class='line'><span class="kd">public</span> <span class="kd">abstract</span> <span class="n">Sort</span> <span class="nf">impl</span><span class="o">();</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="cm">/**</span>
</span><span class='line'><span class="cm"> * 排序算法工具类</span>
</span><span class='line'><span class="cm"> */</span>
</span><span class='line'><span class="kd">class</span> <span class="nc">SortUtil</span> <span class="o">{</span>
</span><span class='line'><span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">swap</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">,</span> <span class="kt">int</span> <span class="n">i</span><span class="o">,</span> <span class="kt">int</span> <span class="n">j</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="kt">int</span> <span class="n">temp</span> <span class="o">=</span> <span class="n">data</span><span class="o">[</span><span class="n">i</span><span class="o">];</span>
</span><span class='line'>  <span class="n">data</span><span class="o">[</span><span class="n">i</span><span class="o">]</span> <span class="o">=</span> <span class="n">data</span><span class="o">[</span><span class="n">j</span><span class="o">];</span>
</span><span class='line'>  <span class="n">data</span><span class="o">[</span><span class="n">j</span><span class="o">]</span> <span class="o">=</span> <span class="n">temp</span><span class="o">;</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'>
</span><span class='line'><span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">print</span><span class="o">(</span><span class="kt">int</span><span class="o">[]</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>  <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">each</span> <span class="o">:</span> <span class="n">data</span><span class="o">)</span> <span class="o">{</span>
</span><span class='line'>      <span class="n">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">print</span><span class="o">(</span><span class="n">each</span> <span class="o">+</span> <span class="s">&quot; &quot;</span><span class="o">);</span>
</span><span class='line'>  <span class="o">}</span>
</span><span class='line'>  <span class="n">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">();</span>
</span><span class='line'><span class="o">}</span>
</span><span class='line'><span class="o">}</span>
</span></code></pre></td></tr></table></div></figure>

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<time datetime="2010-08-09T13:09:09+08:00" pubdate data-updated="true">Aug 9<span>th</span>, 2010</time>
      

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